Yarn winding mechanism



July 23, 1935.

R. LEESON YARN WINDING MECHANISM Filed March 6, 1955 INVENI'EIR:

UNITED STATES.

PATENT. OFFICE YARN MECHANISM Robert A. Leeson, Boston, Masa, assignor to Universal Winding Company, Boston, Mass a corporation of Massachusetts Application March c, 193:, Serial No. 659,620 I z Claims- (01. 242-43) 1 The invention herein" specifically comprises a modification of and improvement on Reece Patent No. 1,749,355, granted March 4, 1930, wherein traversing means for windingmachines is disclosed which comprises a cylindrical roll or drum,

- having a surface groovein the form of opposite crossing helices extending the length of theroll, the roll being in contact or approximate contact with the yarn package, and the yarn is guided onto the package by means of the guiding groove.

Briefly, my invention consists in providing the cylinder of the Reece roll or of any winding drum with a concaved surface, inclining the axis of the cop-tube or yam-receiver at an angle to the axis of 1 the receiver roll, in horizontal projection,

whereby there a frictional contact between the I entire peripheral surfaces of the roll and yarn package as ,eachrevolves. In this way a yarn package of theideal shape is produced on the Reeoeroll.--

80 While the invention is illustrated and spoken of as an improvement on the Reece roll, it is not so limited in its application, but is applicable to any drum winder, even though the yarn be guided onto the package by means of the old reciprocating 85 -traversing arm.

Other objects and advantages of this invention will appearin the following description and appended claims, reference being had to the accompanying drawing forming a part of this speci-i flcation wherein like reference characters designate corresponding parts inthe several-views.

In the drawing-:4,

' Fig. 1 is a front elevational view of a' Reece roll}:

" lutions from one end to the other, and there are modified to embody my invention. V a Fig. 2 is a front elevational view of a packe produced by my modified Reece roll with its parts diagrammatically indicated thereon, and the bulging ridge on the ends 'of an ordinary package indicatedin dotted lines. p j Fig. 3 is a front elevational view of my modifled Reece roll in contact with the yarn package;

and

Fig. 4 is a plan view showing the: respe tive axes of rotation of the roll and yarn package in hori zontal projection. i I

instead of being a true c Before explaining in detail the present invention it is tobe understood that the invention is not limited in its applicationto the details of construction and arrangement of parts illus-- trated inthe accompanying drawing, since the 5 invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein isfo'r-the purpose of description and not of limitation; and it is not 10 intended to limit the invention claimed herein beyond the requirements" of the prior art. a In the drawing the grooved traverse roll or Reece roll which serves as a means for guiding the yarn onto the package is indicated at I II. The 5 yarn package may be driven from a driving roll -'or drum not shown, or it may be driven directly from the Reece roll ID as indicated in Fig; 3. The roll ill is similarin all respects to the Reece roll of the Reece Patent No. 1,749,355, except-that 20 yiinder, its surfaces are concaved as shown in Fig. 1'. As in the Reece .roll, the groove in the periphery of the roll it continues from one end tothe other and back again in the reverse direction, but for convenience g of description that partof the groovewhich extends in one direction will hereafter bereferred to as one groove I band the other part extending in the opposite direction as another groove I2. The two grooves II and I! may be oil-uniform length and a) pitch, andwith any desired number of convolutions or turns. about the axis of the traverse roll 10. For-winding. the frusto-conical shaped package and to insure an even distribution of yarn on the package, the grooves or helices are con- 5 structed of variable pitch, with the steeper pitch. and consequently the turns farther apart, at the end adjacent the small end of the yarn package.

AsshowninPlgaiandmthepitehofthegrooves is arranged to distribute more yarn on'the large 40 end of the packa e and lesson'the small and thus making an evenly wound cone-shaped package;

As shown. each groove makes'four tin-us or revoconsequently three crossing. ints on one side 5 of'the roll-and four on the reverse side, as shown g in 1'18. 1. with the mm in the. roll arrang as shown herein the yarn being guided for traverse therein willbec'ausedto make four turns or convolutions around the surface of the cop-tube or 5 yarn receiver '1 at the start of the winding, as-- suming that the diameters are the same and that the receiver'is drawnatthe same rate of speed as the roll. But as the increases in the cop or package it will be rotated .55

at a gradually diminishing speed and consequently the strand will be laid with a correspondingly less number of turns in its traverse from one end of the package to the other.

The grooves II and. I2 in the surface of the traverse roll I. may be of suitable width to accommodate varying thicknesses of yarn. The two grooves H and I! are of substantially uniform depth throughout a portion of their extent, but at the points where they intersect the bottom profile of one groove is raised above the other, as shown in the Reece patent in accordance with the direction in which the strand travels in the groove. In other words one groove is less in depth and the other groove is deeper to prevent the strand from being diverted at the crossover in the groove in which it is travelling in one direction to the groove extending in the opposite direction. As shown in Fig. 1, the grooves H and I2 are bevelled of! or chami'ered on their sides at points beyond the crossovers, these chamfered portions being designated generally by the reference character It. When the strand travelling in one groove meets the other groove at the crossover there would be a. tendency, if not so chamfered, for it to catch on the point projecting toward the crossover so that it might be diverted into the groove extending in the opposite direction and thus fail to be traversed throughout the whole length of one groove before being reversed to return in the other groove. To prevent such diversion of the strand at points at the crossovers the grooves are chamfered or bevelled oi! as at ll. For a more complete disclosure and description of the method and operation of the Reece roll, reference is made to the drawing and specification of the Reece Patent No. 1,749,355, aforesaid.

Fig. 1 of the Reece patent shows a front elevation of the traversing roll and cop-tube or yarn receiver T with their surfaces in contact, and Fig. 2 is a plan view of the same showing that the axes of rotation of roll and tube are in a common oblique plane but at an angle to each other in that plane. This arrangementjof a cone-shaped tube and yarn package, however, in which the two axes of rotation are at an angle to each other in their plane is not essential to the operation of the Reece roll, because a true cylindrical package can be wound as well, in which the respective axes of rotation are parallel in their common'plane. By experience it was found that in winding-from this position of roll and tube, there was a distor-' tion or tension on the yarn at the apex end of the tube which resulted in a poorly formed and defec- I tive package. This difiiculty was overcome by tilting the tube outwardly in a horizontal plane on an axis substantially central of tube and roll (when looking at the machine from the front as in Fig. 1) and displacing the axes-of rotation of roll and tube'from their common oblique plane and making them at an angleto each other in horizontal projection. In this position the ends of the tube were no longer in peripheral contact withtheendsoftheroll andtherewasapiiing' up of yarn to produce an annular ridge I on the ends of the package, as shown in dotted lines in- Fig. 2 herein, producing a concave-surfaced package. This package proved most unsatisfactorzasindrawingtheyamoflthetopJt would rub'or catch against the ridge or bulge I. at the top of the package. interfering with unwinding,- and camingweakenlngorbreakage ofthe yarn.

Ihave overcome these diiiiculties by-meansof my invention which consists in concaving the surfaceoftheReecerollfromendto (as showninl'lglherein). Thus withtheaxesof rotation of roll and tube inclined at an angle to each other in horiaontal projection, there is a frictional contact between the entire periphe yarn in winding on the apex end of'the package.

It is obvious that the degree or radius of concavity on the Reece roll can be varied as desired according to the length of the yarn package and the angle of inclination of the yarn tube toward the roll in a vertical plane. As shown in Fig. 1, the most satisfactorily shaped package is frustoconical, with the bottom or under surface tapering like a saucer, and. the top'surface concaved, but the mechanism for forming the top and bottom surfaces is well known and forms no part of my invention.

The yarn package can be made convex or barrel-shaped on the sides, if desired, merely by changing the degree or radius of concavity of the roll. Such a package is more satisfactory for some purposes than the true conical-shaped package. A deeper concavity on the roll for instance, with the angle of inclination of yarn tube and roll and their respective lengths kept constant, would produce a frictional contact chiefly at the ends of the yarn package and there would be a piling up of yarn-in the middle of the package, giving it a convex or barrel shape.

The shape of the yarn package is highly important in the textile industry and by means of my invention I have enabled a yarn package of the ideal shape to be produced on the more effective Reece roll. The advantages are, first, that the package unwinds better, since in drawing the yarn oi the surface of the cone into a knitting machine, for instance, there is no chance for the-yarn to wear or catch against any ridge on the end of the cone, and second, the package transports better, since in transportation the friction of the cones against each other is distributed over the entire surface instead of confined to the ends, and this prevents wear and weakening of the yarn strands.

I claim 1. In a winding machine a ooncaved cylindrical rotating element having a strand receiving and guiding groove on its peripheral surface,

and a yarn receiver mounted for peripheral contact with said rotating element, the axes of rotation of. said yarn receiver and rotating element be ng inclined at an tion.

2. In a winding machine a concaved cylindrical rotating element having a strand receiving and guiding groove on its peripheral surface consisting of crossing and connecting-helices, and.

a yarn receiver mounted for peripheral contact with said rotating element, the axesof-rotation of said yarn receiver inclined at an angle in horizontal projection.

ROBIR'I' A. LEESON.

and rotating element being angle in horizontal vprojec- 

